invoke

v. requests help or protection (from a deity); summon a spirit through witchcraft; request, make an appeal; pray; activate a command, cause a certain action (Computers)

Invocation can also mean starting computer software. See execution (computers) and invocational media. For the 2001 album by the band Canvas see Invocation (album). An invocation (from the Latin verb invocare "to call on, invoke") may take the form of:Supplication or prayer.A form of possession.Command or conjuration.Self-identification with certain spirits.
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Verb
1. evoke or call forth, with or as if by magic; "raise the specter of unemployment"; "he conjured wild birds in the air"; "stir a disturbance"; "call down the spirits from the mountain"
(synonym) raise, conjure, conjure up, evoke, stir, call down, arouse, bring up, put forward, call forth
(hypernym) make, create
(hyponym) curse, beshrew, damn, bedamn, anathemize, anathemise, imprecate, maledict
(verb-group) provoke, evoke, call forth, kick up
(derivation) invocation
2. cite as an authority; resort to; "He invoked the law that would save him"; "I appealed to the law of 1900"; "She invoked an ancient law"
(synonym) appeal
(hypernym) mention, advert, bring up, cite, name, refer
3. request earnestly (something from somebody); ask for aid or protection; "appeal to somebody for help"; "Invoke God in times of trouble"
(synonym) appeal
(hypernym) request, bespeak, call for, quest
(hyponym) plead
(derivation) invocation, supplication

(v. t.)
To call on for aid or protection; to invite earnestly or solemnly; to summon; to address in prayer; to solicit or demand by invocation; to implore; as, to invoke the Supreme Being, or to invoke His and blessing.
  

Synonyms and related words:
accost, address, adjure, apostrophize, appeal, appeal to, approach, beg, beseech, bespeak, bid come, buttonhole, call, call away, call back, call for, call for help, call forth, call in, call on, call out, call to, call together, call up, call up spirits, call upon, cite, clamor for, commune with God, conjure, conjure up, conjure up spirits, convene, convoke, crave, cross-refer, cross-reference, cry for, cry on, cry to, demand, direct attention to, effect, entreat, evoke, give thanks, greet, hail, halloo, impetrate, implement, implore, importune, imprecate, indent, kneel to, make a cross-reference, make reference to, make supplication, muster, muster up, obtest, offer a prayer, order up, page, petition, plead, plead for, pray, pray over, preconize, raise, raise ghosts, recall, recite the rosary, refer to, reference, requisition, return thanks, run to, salute, say grace, send after, send for, serve, speak, speak fair, speak to, subpoena, summon, summon forth, summon spirits, summon up, summons, supplicate, take aside, talk to